<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>
<script>
    const obj = {
        a:1
    }
    const obj2 = {
        a:2
    }
    const obj3 = obj;
    console.log(obj === obj2);// false
    console.log(obj === obj3);// true
    obj3.a = 200;
    console.log(obj.a);// 200


</script>
</html>